/*++

Copyright (c) 2006, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 

Module Name:

  Udp4Driver.c

Abstract:

--*/

#include "Udp4Impl.h"

EFI_DRIVER_BINDING_PROTOCOL gUdp4DriverBinding = {
  Udp4DriverBindingSupported,
  Udp4DriverBindingStart,
  Udp4DriverBindingStop,
  0xa,
  NULL,
  NULL
};

EFI_SERVICE_BINDING_PROTOCOL mUdp4ServiceBinding = {
  Udp4ServiceBindingCreateChild,
  Udp4ServiceBindingDestroyChild
};

EFI_STATUS
EFIAPI
Udp4DriverBindingSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath  OPTIONAL
  )
/*++

Routine Description:

  Test to see if this driver supports ControllerHandle. 

Arguments:

  This                - Protocol instance pointer.
  ControllerHandle    - Handle of device to test.
  RemainingDevicePath - Optional parameter use to pick a specific child 
                        device to start.

Returns:

  EFI_SUCCES          - This driver supports this device.
  EFI_ALREADY_STARTED - This driver is already running on this device.

--*/
{
  EFI_STATUS  Status;

  //
  // Test for the Udp4ServiceBinding Protocol
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle, 
                  &gEfiUdp4ServiceBindingProtocolGuid, 
                  NULL,
                  This->DriverBindingHandle,   
                  ControllerHandle,   
                  EFI_OPEN_PROTOCOL_TEST_PROTOCOL
                  );
  if (!EFI_ERROR (Status)) {
    return EFI_ALREADY_STARTED;
  }

  //
  // Test for the Ip4 Protocol
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,       
                  &gEfiIp4ServiceBindingProtocolGuid, 
                  NULL,
                  This->DriverBindingHandle,   
                  ControllerHandle,   
                  EFI_OPEN_PROTOCOL_TEST_PROTOCOL
                  );

  return Status;
}

EFI_STATUS
EFIAPI
Udp4DriverBindingStart (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath  OPTIONAL
  )
/*++

Routine Description:

  Start this driver on ControllerHandle.

Arguments:

  This                - Protocol instance pointer.
  ControllerHandle    - Handle of device to bind driver to
  RemainingDevicePath - Optional parameter use to pick a specific child 
                        device to start.

Returns:

  EFI_SUCCES          - This driver is added to ControllerHandle
  EFI_ALREADY_STARTED - This driver is already running on ControllerHandle
  other               - This driver does not support this device

--*/
{
  EFI_STATUS         Status;
  UDP4_SERVICE_DATA  *Udp4Service;

  //
  // Allocate Private Context Data Structure.
  //
  Udp4Service = NetAllocatePool (sizeof (UDP4_SERVICE_DATA));
  if (Udp4Service == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }

  Status = Udp4CreateService (Udp4Service, This->DriverBindingHandle, ControllerHandle);
  if (EFI_ERROR (Status)) {
    goto FREE_SERVICE;
  }

  //
  // Install the Udp4ServiceBindingProtocol on the ControllerHandle.
  //
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &ControllerHandle,
                  &gEfiUdp4ServiceBindingProtocolGuid,
                  &Udp4Service->ServiceBinding,
                  NULL
                  );
  if (EFI_ERROR (Status)) {
    goto CLEAN_SERVICE;
  }

  Udp4SetVariableData (Udp4Service);

  return Status;

CLEAN_SERVICE:

  Udp4CleanService (Udp4Service);

FREE_SERVICE:

  NetFreePool (Udp4Service);

  return Status;
}

EFI_STATUS
EFIAPI
Udp4DriverBindingStop (
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN  EFI_HANDLE                   ControllerHandle,
  IN  UINTN                        NumberOfChildren,
  IN  EFI_HANDLE                   *ChildHandleBuffer
  )
/*++

Routine Description:

  Stop this driver on ControllerHandle.

Arguments:

  This              - Protocol instance pointer.
  ControllerHandle  - Handle of device to stop driver on 
  NumberOfChildren  - Number of Handles in ChildHandleBuffer. If number of 
                      children is zero stop the entire bus driver.
  ChildHandleBuffer - List of Child Handles to Stop.

Returns:

  EFI_SUCCES - This driver is removed ControllerHandle.
  other      - This driver was not removed from this device.

--*/
{
  EFI_STATUS                    Status;
  EFI_HANDLE                    NicHandle;
  EFI_SERVICE_BINDING_PROTOCOL  *ServiceBinding;
  UDP4_SERVICE_DATA             *Udp4Service;
  UDP4_INSTANCE_DATA            *Instance;

  //
  // Find the NicHandle where UDP4 ServiceBinding Protocol is installed.
  //
  NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiIp4ProtocolGuid);
  if (NicHandle == NULL) {
    return EFI_SUCCESS;
  }

  //
  // Retrieve the UDP4 ServiceBinding Protocol.
  //
  Status = gBS->OpenProtocol (
                  NicHandle,
                  &gEfiUdp4ServiceBindingProtocolGuid,
                  (VOID **) &ServiceBinding,
                  This->DriverBindingHandle,
                  NicHandle,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (EFI_ERROR (Status)) {
    return EFI_DEVICE_ERROR;
  }

  Udp4Service = UDP4_SERVICE_DATA_FROM_THIS (ServiceBinding);

  //
  // Uninstall the UDP4 ServiceBinding Protocol.
  //
  Status = gBS->UninstallMultipleProtocolInterfaces (
                  NicHandle,
                  &gEfiUdp4ServiceBindingProtocolGuid,
                  &Udp4Service->ServiceBinding,
                  NULL
                  );
  if (EFI_ERROR (Status)) {
    return EFI_DEVICE_ERROR;
  }

  while (!NetListIsEmpty (&Udp4Service->ChildrenList)) {
    //
    // Destroy all instances.
    //
    Instance = NET_LIST_HEAD (&Udp4Service->ChildrenList, UDP4_INSTANCE_DATA, Link);

    ServiceBinding->DestroyChild (ServiceBinding, Instance->ChildHandle);
  }

  Udp4ClearVariableData (Udp4Service);

  Udp4CleanService (Udp4Service);

  NetFreePool (Udp4Service);

  return EFI_SUCCESS;
}

EFI_STATUS
EFIAPI
Udp4ServiceBindingCreateChild (
  IN EFI_SERVICE_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                    *ChildHandle
  )
/*++

Routine Description:

  Creates a child handle with a set of I/O services.

Arguments:

  This         - Protocol instance pointer.
  ChildHandle  - Pointer to the handle of the child to create.  
                 If it is NULL, then a new handle is created.  
                 If it is not NULL, then the I/O services are 
                 added to the existing child handle.

Returns:

  EFI_SUCCES           - The child handle was created with the I/O services
  EFI_OUT_OF_RESOURCES - There are not enough resources availabe to create 
                         the child
  other                - The child handle was not created

--*/
{
  EFI_STATUS          Status;
  UDP4_SERVICE_DATA   *Udp4Service;
  UDP4_INSTANCE_DATA  *Instance;
  EFI_TPL             OldTpl;
  VOID                *Ip4;

  if ((This == NULL) || (ChildHandle == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  Udp4Service = UDP4_SERVICE_DATA_FROM_THIS (This);

  //
  // Allocate the instance private data structure.
  // 
  Instance = NetAllocatePool (sizeof (UDP4_INSTANCE_DATA));
  if (Instance == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }

  Udp4InitInstance (Udp4Service, Instance);

  //
  // Add an IpInfo for this instance.
  //
  Instance->IpInfo = IpIoAddIp (Udp4Service->IpIo);
  if (Instance->IpInfo == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto FREE_INSTANCE;
  }

  //
  // Install the Udp4Protocol for this instance.
  //
  Status = gBS->InstallMultipleProtocolInterfaces (
                  ChildHandle,
                  &gEfiUdp4ProtocolGuid,
                  &Instance->Udp4Proto,
                  NULL
                  );
  if (EFI_ERROR (Status)) {
    goto REMOVE_IPINFO;
  }

  Instance->ChildHandle = *ChildHandle;

  //
  // Open the default Ip4 protocol in the IP_IO BY_CHILD.
  //
  Status = gBS->OpenProtocol (
                  Udp4Service->IpIo->ChildHandle,
                  &gEfiIp4ProtocolGuid,
                  (VOID **) &Ip4,
                  gUdp4DriverBinding.DriverBindingHandle,
                  Instance->ChildHandle,
                  EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
                  );
  if (EFI_ERROR (Status)) {
    goto UNINSTALL_PROTOCOL;
  }

  OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);

  //
  // Link this instance into the service context data and increase the ChildrenNumber.
  //
  NetListInsertTail (&Udp4Service->ChildrenList, &Instance->Link);
  Udp4Service->ChildrenNumber++;

  NET_RESTORE_TPL (OldTpl);

  return Status;

UNINSTALL_PROTOCOL:

  gBS->UninstallMultipleProtocolInterfaces (
         Instance->ChildHandle,
         &gEfiUdp4ProtocolGuid,
         &Instance->Udp4Proto,
         NULL
         );

REMOVE_IPINFO:

  IpIoRemoveIp (Udp4Service->IpIo, Instance->IpInfo);
  
FREE_INSTANCE:

  Udp4CleanInstance (Instance);

  NetFreePool (Instance);

  return Status;
}

EFI_STATUS
EFIAPI
Udp4ServiceBindingDestroyChild (
  IN EFI_SERVICE_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                    ChildHandle
  )
/*++

Routine Description:

  Destroys a child handle with a set of I/O services.

Arguments:

  This         - Protocol instance pointer.
  ChildHandle  - Handle of the child to destroy

Returns:

  EFI_SUCCES            - The I/O services were removed from the child handle
  EFI_UNSUPPORTED       - The child handle does not support the I/O services 
                          that are being removed
  EFI_INVALID_PARAMETER - Child handle is not a valid EFI Handle.
  EFI_ACCESS_DENIED     - The child handle could not be destroyed because its 
                          I/O services are being used.
  other                 - The child handle was not destroyed

--*/
{
  EFI_STATUS          Status;
  UDP4_SERVICE_DATA   *Udp4Service;
  EFI_UDP4_PROTOCOL   *Udp4Proto;
  UDP4_INSTANCE_DATA  *Instance;
  EFI_TPL             OldTpl;

  if ((This == NULL) || (ChildHandle == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  Udp4Service = UDP4_SERVICE_DATA_FROM_THIS (This);

  //
  // Try to get the Udp4 protocol from the ChildHandle.
  //
  Status = gBS->OpenProtocol (
                  ChildHandle,
                  &gEfiUdp4ProtocolGuid,
                  (VOID **) &Udp4Proto,
                  gUdp4DriverBinding.DriverBindingHandle,
                  ChildHandle,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (EFI_ERROR (Status)) {
    return EFI_UNSUPPORTED;
  }

  Instance = UDP4_INSTANCE_DATA_FROM_THIS (Udp4Proto);

  if (Instance->Destroyed) {
    return EFI_SUCCESS;
  }

  //
  // Use the Destroyed flag to avoid the re-entering of the following code.
  //
  Instance->Destroyed = TRUE;

  //
  // Close the Ip4 protocol.
  //
  gBS->CloseProtocol (
         Udp4Service->IpIo->ChildHandle,
         &gEfiIp4ProtocolGuid,
         gUdp4DriverBinding.DriverBindingHandle,
         Instance->ChildHandle
         );

  //
  // Uninstall the Udp4Protocol previously installed on the ChildHandle.
  //
  Status = gBS->UninstallMultipleProtocolInterfaces (
                  ChildHandle,
                  &gEfiUdp4ProtocolGuid,
                  (VOID *) &Instance->Udp4Proto,
                  NULL
                  );
  if (EFI_ERROR (Status)) {
    Instance->Destroyed = FALSE;
    return Status;
  }

  //
  // Reset the configuration in case the instance's consumer forgets to do this.
  //
  Udp4Proto->Configure (Udp4Proto, NULL);

  //
  // Remove the IpInfo this instance consumes.
  //
  IpIoRemoveIp (Udp4Service->IpIo, Instance->IpInfo);

  OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);

  //
  // Remove this instance from the service context data's ChildrenList.
  //
  NetListRemoveEntry (&Instance->Link);
  Udp4Service->ChildrenNumber--;

  //
  // Clean the instance.
  //
  Udp4CleanInstance (Instance);

  NET_RESTORE_TPL (OldTpl);

  NetFreePool (Instance);

  return EFI_SUCCESS;
}

EFI_DRIVER_ENTRY_POINT (Udp4DriverEntryPoint)

EFI_STATUS
EFIAPI
Udp4DriverEntryPoint (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
/*++

Routine Description:

  The entry point for Udp4 driver which installs the driver binding
  and component name protocol on its ImageHandle.

Arguments:

  ImageHandle - The image handle of the driver.
  SystemTable - The system table.

Returns:

  EFI_SUCCESS - if the driver binding and component name protocols are
                successfully installed, otherwise if failed.

--*/
{
  EFI_STATUS  Status;

  //
  // Install the Udp4DriverBinding and Udp4ComponentName protocols.
  //
  Status = NetLibInstallAllDriverProtocols (
             ImageHandle,
             SystemTable,
             &gUdp4DriverBinding,
             ImageHandle,
             &gUdp4ComponentName,
             NULL,
             NULL
             );
  if (!EFI_ERROR (Status)) {
    //
    // Initialize the UDP random port.
    //
    mUdp4RandomPort = ((UINT16) NetRandomInitSeed ()) % UDP4_PORT_KNOWN + UDP4_PORT_KNOWN;
  }

  return Status;
}

